I have a Dell Inspiron 7757 laptop with a factory-installed 16.04. As I used to work on Windows, I tried to change key bindings to more familiar ones. For example, I wanted to use Super + L to lock the screen and Super + D to minimize all windows.
I changed key bindings in System Settings app but the desired bindings won't work. Meanwhile when I press Ctrl + Alt + L, the workstation locks! It's very annoying because in the software I use (Intellij IDEA) this binding has a different meaning.
The same goes for Super + D. It doesn't work, but Ctrl + Alt + D does its work instead.
The most intriguing is that Super + T which I assigned to 'Launch Terminal' action works properly.